Trillian is a multiprotocol im app for Windows, MacOS X, Android, iOS, Blackberry OSand can connect to: AIM,Yahoo IM, Windows Live messenger, IRC, Bonjour, Novell GroupWise messenger, XMPP and Skype networks and to Facebook, Twitter, LinkdIn, FourSquare and MySpace as well as to POP3, IMAP, Hotmail, WindowsLive mail, Gmail and Yahoo mail. All have their own colors and indicators and icons. You can use pictures of your contacts as well.
You can create multiple connections to the same service, and can also group connections under separate identities to prevent confusion.
All your contacts are gathered under the same, unified contact list. Your contacts are not bound to their own IM service groups, and can be dragged and dropped freely.
Trillian exists in a ‘free’ version (you get some pop up ads in the messenger window – hint: just mouseover until you get the underline to appear and click on that) as well as the Pro version for a fee of $12 a year you get cloud storage of your messaging as well as a spiffier interface.
I use it, and I like it. I see no minuses to it. You choose what you connect to on booting the app, and subsequently. You can have all channels on, or just one or two. That’s up to you.
You can start your chat on your desktop or laptop and continue on your phone….
Trillian has extensive help info, support and forums, at the website below, as well as more screen shots.
You can read about it and download it here: http://www.trillian.im/